Portable battery generator



FIG. 1 is a perspective view of an ornamental design for a portable battery generator showing our new design;

FIG. 2 is a perspective view viewed from another angle thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the figures are for environmental purposes only and form no part of the claimed design.

Any shading and cross-hatching are not features of the design but are utilized to illustrate the surface contours of the portable battery generator in the drawings. 

CLAIM The ornamental design for a portable battery generator, as shown and described. 